Sgt. John M. Delaney said the Flo Barbershop, 278 Oakland St., has been the focus of a police investigation for into drug-dealing and gang activity for several months.

Officers Norberto Diaz, Tim Flanagan and Roberto Flores set up their surveillance about 5:45 p.m. and observed a barber, later identified as Alexander Dominguez selling crack, Delaney, aide to Commissioner William J. Fitchet, said.

Police arrested the suspect and found seven bags of crack cocaine, four larger bags of powdered cocaine, a bag of marijuana and $325 in cash.

Dominguez, 23, told police that he did not have a barber’s license and the three other barbers in the shop did not have licenses as well, Delaney, aide to Commissioner William J. Fitchet, said.

When police summoned the owner of the business to the scene he too could not produce a license, Delaney said.

The barbershop, meanwhile, was full of customers, Delaney said.

Dominguez. of 109 Abbe Ave., was charged with possession of cocaine with intent to distribute, possession of marijuana with intent to distribute and violation of a drug-free zone (Kensington School).

Delaney said police are powerless to shut down such illegal barber operations and that police have asked the state’s Division of Licensure, located at 436 Dwight St. to immediately shut the shop down.